Read the statement by Michael Teeuw here.
SOLVED Trying to remove Weeks column, and change grid on CalendarExt
Again, I must be doing something wrong. I have added showWeeks: 0 in a number of places but it still shows the weeks column. I have included a stylename reference, but regardless of which style I use, the grid always looks the same. Other than those two items, the config file is working.
SOLVED. I was using an uppercase letter for the parameter name when it should have been lowercase.